shinichi nakazawa / mbed-src

mbed library sources

Dependents:   Nucleo_blink_led

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC15XX/serial_api.c@504:f0fe52f5109e, 2015-04-07 (annotated)

Committer:
mbed_official
Date:
Tue Apr 07 07:45:07 2015 +0100
Revision:
504:f0fe52f5109e
Parent:
381:5460fc57b6e4 
Synchronized with git revision dc0b26d56af5e66054fd4afe32172c8d28c36a6f



Full URL: https://github.com/mbedmicro/mbed/commit/dc0b26d56af5e66054fd4afe32172c8d28c36a6f/



LPC1549  - Properly disable usart interrupt

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 103:9b881da47c92 1 /* mbed Microcontroller Library
mbed_official 103:9b881da47c92 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 103:9b881da47c92 3 *
mbed_official 103:9b881da47c92 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 103:9b881da47c92 5 * you may not use this file except in compliance with the License.
mbed_official 103:9b881da47c92 6 * You may obtain a copy of the License at
mbed_official 103:9b881da47c92 7 *
mbed_official 103:9b881da47c92 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 103:9b881da47c92 9 *
mbed_official 103:9b881da47c92 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 103:9b881da47c92 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 103:9b881da47c92 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 103:9b881da47c92 13 * See the License for the specific language governing permissions and
mbed_official 103:9b881da47c92 14 * limitations under the License.
mbed_official 103:9b881da47c92 15 */
mbed_official 103:9b881da47c92 16 // math.h required for floating point operations for baud rate calculation
mbed_official 227:7bd0639b8911 17 #include "mbed_assert.h"
mbed_official 103:9b881da47c92 18 #include <math.h>
mbed_official 103:9b881da47c92 19 #include <string.h>
mbed_official 103:9b881da47c92 20
mbed_official 103:9b881da47c92 21 #include "serial_api.h"
mbed_official 103:9b881da47c92 22 #include "cmsis.h"
mbed_official 103:9b881da47c92 23 #include "pinmap.h"
mbed_official 285:31249416b6f9 24 #include "mbed_error.h"
mbed_official 103:9b881da47c92 25
mbed_official 103:9b881da47c92 26 /******************************************************************************
mbed_official 103:9b881da47c92 27 * INITIALIZATION
mbed_official 103:9b881da47c92 28 ******************************************************************************/
mbed_official 103:9b881da47c92 29 #define UART_NUM 3
mbed_official 103:9b881da47c92 30
mbed_official 103:9b881da47c92 31 static const SWM_Map SWM_UART_TX[] = {
mbed_official 103:9b881da47c92 32 {0, 0}, // Pin assign register0, 7:0bit
mbed_official 103:9b881da47c92 33 {1, 8}, // Pin assign register1, 15:8bit
mbed_official 103:9b881da47c92 34 {2, 16}, // Pin assign register2, 23:16bit
mbed_official 103:9b881da47c92 35 };
mbed_official 103:9b881da47c92 36
mbed_official 103:9b881da47c92 37 static const SWM_Map SWM_UART_RX[] = {
mbed_official 103:9b881da47c92 38 {0, 8},
mbed_official 103:9b881da47c92 39 {1, 16},
mbed_official 103:9b881da47c92 40 {2, 24},
mbed_official 103:9b881da47c92 41 };
mbed_official 103:9b881da47c92 42
mbed_official 103:9b881da47c92 43 static const SWM_Map SWM_UART_RTS[] = {
mbed_official 103:9b881da47c92 44 {0, 16},
mbed_official 103:9b881da47c92 45 {1, 24},
mbed_official 182:242346c42295 46 {3, 0}, // not available
mbed_official 103:9b881da47c92 47 };
mbed_official 103:9b881da47c92 48
mbed_official 103:9b881da47c92 49 static const SWM_Map SWM_UART_CTS[] = {
mbed_official 103:9b881da47c92 50 {0, 24},
mbed_official 103:9b881da47c92 51 {2, 0},
mbed_official 182:242346c42295 52 {3, 8} // not available
mbed_official 103:9b881da47c92 53 };
mbed_official 103:9b881da47c92 54
mbed_official 103:9b881da47c92 55 // bit flags for used UARTs
mbed_official 103:9b881da47c92 56 static unsigned char uart_used = 0;
mbed_official 103:9b881da47c92 57 static int get_available_uart(void) {
mbed_official 103:9b881da47c92 58 int i;
mbed_official 103:9b881da47c92 59 for (i=0; i<3; i++) {
mbed_official 103:9b881da47c92 60 if ((uart_used & (1 << i)) == 0)
mbed_official 103:9b881da47c92 61 return i;
mbed_official 103:9b881da47c92 62 }
mbed_official 103:9b881da47c92 63 return -1;
mbed_official 103:9b881da47c92 64 }
mbed_official 103:9b881da47c92 65
mbed_official 103:9b881da47c92 66 #define UART_EN (0x01<<0)
mbed_official 103:9b881da47c92 67
mbed_official 103:9b881da47c92 68 #define CTS_DELTA (0x01<<5)
mbed_official 103:9b881da47c92 69 #define RXBRK (0x01<<10)
mbed_official 103:9b881da47c92 70 #define DELTA_RXBRK (0x01<<11)
mbed_official 103:9b881da47c92 71
mbed_official 103:9b881da47c92 72 #define RXRDY (0x01<<0)
mbed_official 103:9b881da47c92 73 #define TXRDY (0x01<<2)
mbed_official 103:9b881da47c92 74
mbed_official 103:9b881da47c92 75 #define TXBRKEN (0x01<<1)
mbed_official 103:9b881da47c92 76 #define CTSEN (0x01<<9)
mbed_official 103:9b881da47c92 77
mbed_official 103:9b881da47c92 78 static uint32_t UARTSysClk;
mbed_official 103:9b881da47c92 79
mbed_official 103:9b881da47c92 80 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 103:9b881da47c92 81 static uart_irq_handler irq_handler;
mbed_official 103:9b881da47c92 82
mbed_official 103:9b881da47c92 83 int stdio_uart_inited = 0;
mbed_official 103:9b881da47c92 84 serial_t stdio_uart;
mbed_official 103:9b881da47c92 85
mbed_official 182:242346c42295 86 static void switch_pin(const SWM_Map *swm, PinName pn)
mbed_official 182:242346c42295 87 {
mbed_official 182:242346c42295 88 uint32_t regVal;
mbed_official 182:242346c42295 89 if (pn != NC)
mbed_official 182:242346c42295 90 {
mbed_official 182:242346c42295 91 // check if we have any function mapped to this pin already and remove it
mbed_official 234:37acebda271b 92 for (uint32_t n = 0; n < sizeof(LPC_SWM->PINASSIGN)/sizeof(*LPC_SWM->PINASSIGN); n ++) {
mbed_official 182:242346c42295 93 regVal = LPC_SWM->PINASSIGN[n];
mbed_official 234:37acebda271b 94 for (uint32_t j = 0; j <= 24; j += 8) {
mbed_official 234:37acebda271b 95 if (((regVal >> j) & 0xFF) == (uint32_t)pn)
mbed_official 182:242346c42295 96 regVal |= (0xFF << j);
mbed_official 182:242346c42295 97 }
mbed_official 182:242346c42295 98 LPC_SWM->PINASSIGN[n] = regVal;
mbed_official 182:242346c42295 99 }
mbed_official 182:242346c42295 100 }
mbed_official 182:242346c42295 101 // now map it
mbed_official 182:242346c42295 102 regVal = LPC_SWM->PINASSIGN[swm->n] & ~(0xFF << swm->offset);
mbed_official 182:242346c42295 103 LPC_SWM->PINASSIGN[swm->n] = regVal | (pn << swm->offset);
mbed_official 182:242346c42295 104 }
mbed_official 182:242346c42295 105
mbed_official 103:9b881da47c92 106 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 103:9b881da47c92 107 int is_stdio_uart = 0;
mbed_official 234:37acebda271b 108
mbed_official 103:9b881da47c92 109 int uart_n = get_available_uart();
mbed_official 103:9b881da47c92 110 if (uart_n == -1) {
mbed_official 103:9b881da47c92 111 error("No available UART");
mbed_official 103:9b881da47c92 112 }
mbed_official 103:9b881da47c92 113 obj->index = uart_n;
mbed_official 381:5460fc57b6e4 114 switch (uart_n) {
mbed_official 381:5460fc57b6e4 115 case 0: obj->uart = (LPC_USART0_Type *)LPC_USART0_BASE; break;
mbed_official 381:5460fc57b6e4 116 case 1: obj->uart = (LPC_USART0_Type *)LPC_USART1_BASE; break;
mbed_official 381:5460fc57b6e4 117 case 2: obj->uart = (LPC_USART0_Type *)LPC_USART2_BASE; break;
mbed_official 381:5460fc57b6e4 118 }
mbed_official 103:9b881da47c92 119 uart_used |= (1 << uart_n);
mbed_official 103:9b881da47c92 120
mbed_official 182:242346c42295 121 switch_pin(&SWM_UART_TX[uart_n], tx);
mbed_official 182:242346c42295 122 switch_pin(&SWM_UART_RX[uart_n], rx);
mbed_official 103:9b881da47c92 123
mbed_official 103:9b881da47c92 124 /* uart clock divided by 6 */
mbed_official 103:9b881da47c92 125 LPC_SYSCON->UARTCLKDIV =6;
mbed_official 103:9b881da47c92 126
mbed_official 103:9b881da47c92 127 /* disable uart interrupts */
mbed_official 103:9b881da47c92 128 NVIC_DisableIRQ((IRQn_Type)(UART0_IRQn + uart_n));
mbed_official 103:9b881da47c92 129
mbed_official 103:9b881da47c92 130 /* Enable UART clock */
mbed_official 103:9b881da47c92 131 LPC_SYSCON->SYSAHBCLKCTRL1 |= (1 << (17 + uart_n));
mbed_official 103:9b881da47c92 132
mbed_official 103:9b881da47c92 133 /* Peripheral reset control to UART, a "1" bring it out of reset. */
mbed_official 103:9b881da47c92 134 LPC_SYSCON->PRESETCTRL1 |= (0x1 << (17 + uart_n));
mbed_official 234:37acebda271b 135 LPC_SYSCON->PRESETCTRL1 &= ~(0x1 << (17 + uart_n));
mbed_official 103:9b881da47c92 136
mbed_official 103:9b881da47c92 137 UARTSysClk = SystemCoreClock / LPC_SYSCON->UARTCLKDIV;
mbed_official 103:9b881da47c92 138
mbed_official 103:9b881da47c92 139 // set default baud rate and format
mbed_official 103:9b881da47c92 140 serial_baud (obj, 9600);
mbed_official 103:9b881da47c92 141 serial_format(obj, 8, ParityNone, 1);
mbed_official 103:9b881da47c92 142
mbed_official 103:9b881da47c92 143 /* Clear all status bits. */
mbed_official 103:9b881da47c92 144 obj->uart->STAT = CTS_DELTA | DELTA_RXBRK;
mbed_official 103:9b881da47c92 145
mbed_official 103:9b881da47c92 146 /* enable uart interrupts */
mbed_official 103:9b881da47c92 147 NVIC_EnableIRQ((IRQn_Type)(UART0_IRQn + uart_n));
mbed_official 103:9b881da47c92 148
mbed_official 103:9b881da47c92 149 /* Enable UART */
mbed_official 103:9b881da47c92 150 obj->uart->CFG |= UART_EN;
mbed_official 103:9b881da47c92 151
mbed_official 103:9b881da47c92 152 is_stdio_uart = ((tx == USBTX) && (rx == USBRX));
mbed_official 103:9b881da47c92 153
mbed_official 103:9b881da47c92 154 if (is_stdio_uart) {
mbed_official 103:9b881da47c92 155 stdio_uart_inited = 1;
mbed_official 103:9b881da47c92 156 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 103:9b881da47c92 157 }
mbed_official 103:9b881da47c92 158 }
mbed_official 103:9b881da47c92 159
mbed_official 103:9b881da47c92 160 void serial_free(serial_t *obj) {
mbed_official 103:9b881da47c92 161 uart_used &= ~(1 << obj->index);
mbed_official 103:9b881da47c92 162 serial_irq_ids[obj->index] = 0;
mbed_official 103:9b881da47c92 163 }
mbed_official 103:9b881da47c92 164
mbed_official 103:9b881da47c92 165 // serial_baud
mbed_official 103:9b881da47c92 166 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 103:9b881da47c92 167 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 103:9b881da47c92 168 /* Integer divider:
mbed_official 103:9b881da47c92 169 BRG = UARTSysClk/(Baudrate * 16) - 1
mbed_official 103:9b881da47c92 170
mbed_official 103:9b881da47c92 171 Frational divider:
mbed_official 103:9b881da47c92 172 FRG = ((UARTSysClk / (Baudrate * 16 * (BRG + 1))) - 1)
mbed_official 103:9b881da47c92 173
mbed_official 103:9b881da47c92 174 where
mbed_official 103:9b881da47c92 175 FRG = (LPC_SYSCON->UARTFRDADD + 1) / (LPC_SYSCON->UARTFRDSUB + 1)
mbed_official 103:9b881da47c92 176
mbed_official 103:9b881da47c92 177 (1) The easiest way is set SUB value to 256, -1 encoded, thus SUB
mbed_official 103:9b881da47c92 178 register is 0xFF.
mbed_official 103:9b881da47c92 179 (2) In ADD register value, depending on the value of UartSysClk,
mbed_official 103:9b881da47c92 180 baudrate, BRG register value, and SUB register value, be careful
mbed_official 103:9b881da47c92 181 about the order of multiplier and divider and make sure any
mbed_official 103:9b881da47c92 182 multiplier doesn't exceed 32-bit boundary and any divider doesn't get
mbed_official 103:9b881da47c92 183 down below one(integer 0).
mbed_official 103:9b881da47c92 184 (3) ADD should be always less than SUB.
mbed_official 103:9b881da47c92 185 */
mbed_official 103:9b881da47c92 186 obj->uart->BRG = UARTSysClk / 16 / baudrate - 1;
mbed_official 103:9b881da47c92 187
mbed_official 103:9b881da47c92 188 // To use of the fractional baud rate generator, you must write 0xFF to the DIV
mbed_official 103:9b881da47c92 189 // value to yield a denominator value of 256. All other values are not supported.
mbed_official 103:9b881da47c92 190 LPC_SYSCON->FRGCTRL = 0xFF;
mbed_official 103:9b881da47c92 191
mbed_official 103:9b881da47c92 192 LPC_SYSCON->FRGCTRL |= ( ( ((UARTSysClk / 16) * (0xFF + 1)) /
mbed_official 103:9b881da47c92 193 (baudrate * (obj->uart->BRG + 1))
mbed_official 103:9b881da47c92 194 ) - (0xFF + 1) ) << 8;
mbed_official 103:9b881da47c92 195
mbed_official 103:9b881da47c92 196 }
mbed_official 103:9b881da47c92 197
mbed_official 103:9b881da47c92 198 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 227:7bd0639b8911 199 MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); // 0: 1 stop bits, 1: 2 stop bits
mbed_official 227:7bd0639b8911 200 MBED_ASSERT((data_bits > 6) && (data_bits < 10)); // 0: 7 data bits ... 2: 9 data bits
mbed_official 227:7bd0639b8911 201 MBED_ASSERT((parity == ParityNone) || (parity == ParityEven) || (parity == ParityOdd));
mbed_official 227:7bd0639b8911 202
mbed_official 103:9b881da47c92 203 stop_bits -= 1;
mbed_official 103:9b881da47c92 204 data_bits -= 7;
mbed_official 103:9b881da47c92 205
mbed_official 103:9b881da47c92 206 int paritysel;
mbed_official 103:9b881da47c92 207 switch (parity) {
mbed_official 103:9b881da47c92 208 case ParityNone: paritysel = 0; break;
mbed_official 103:9b881da47c92 209 case ParityEven: paritysel = 2; break;
mbed_official 103:9b881da47c92 210 case ParityOdd : paritysel = 3; break;
mbed_official 103:9b881da47c92 211 default:
mbed_official 227:7bd0639b8911 212 break;
mbed_official 103:9b881da47c92 213 }
mbed_official 504:f0fe52f5109e 214
mbed_official 504:f0fe52f5109e 215 // First disable the the usart as described in documentation and then enable while updating CFG
mbed_official 504:f0fe52f5109e 216
mbed_official 504:f0fe52f5109e 217 // 24.6.1 USART Configuration register
mbed_official 504:f0fe52f5109e 218 // Remark: If software needs to change configuration values, the following sequence should
mbed_official 504:f0fe52f5109e 219 // be used: 1) Make sure the USART is not currently sending or receiving data. 2) Disable
mbed_official 504:f0fe52f5109e 220 // the USART by writing a 0 to the Enable bit (0 may be written to the entire register). 3)
mbed_official 504:f0fe52f5109e 221 // Write the new configuration value, with the ENABLE bit set to 1.
mbed_official 504:f0fe52f5109e 222 obj->uart->CFG &= ~(1 << 0);
mbed_official 504:f0fe52f5109e 223
mbed_official 504:f0fe52f5109e 224 obj->uart->CFG = (1 << 0) // this will enable the usart
mbed_official 504:f0fe52f5109e 225 | (data_bits << 2)
mbed_official 103:9b881da47c92 226 | (paritysel << 4)
mbed_official 103:9b881da47c92 227 | (stop_bits << 6);
mbed_official 103:9b881da47c92 228 }
mbed_official 103:9b881da47c92 229
mbed_official 103:9b881da47c92 230 /******************************************************************************
mbed_official 103:9b881da47c92 231 * INTERRUPTS HANDLING
mbed_official 103:9b881da47c92 232 ******************************************************************************/
mbed_official 381:5460fc57b6e4 233 static inline void uart_irq(SerialIrq irq_type, uint32_t index) {
mbed_official 103:9b881da47c92 234 if (serial_irq_ids[index] != 0)
mbed_official 103:9b881da47c92 235 irq_handler(serial_irq_ids[index], irq_type);
mbed_official 103:9b881da47c92 236 }
mbed_official 103:9b881da47c92 237
mbed_official 381:5460fc57b6e4 238 void uart0_irq() {uart_irq((LPC_USART0->INTSTAT & 1) ? RxIrq : TxIrq, 0);}
mbed_official 381:5460fc57b6e4 239 void uart1_irq() {uart_irq((LPC_USART1->INTSTAT & 1) ? RxIrq : TxIrq, 1);}
mbed_official 381:5460fc57b6e4 240 void uart2_irq() {uart_irq((LPC_USART2->INTSTAT & 1) ? RxIrq : TxIrq, 2);}
mbed_official 103:9b881da47c92 241
mbed_official 103:9b881da47c92 242 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 103:9b881da47c92 243 irq_handler = handler;
mbed_official 103:9b881da47c92 244 serial_irq_ids[obj->index] = id;
mbed_official 103:9b881da47c92 245 }
mbed_official 103:9b881da47c92 246
mbed_official 103:9b881da47c92 247 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 103:9b881da47c92 248 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 103:9b881da47c92 249 uint32_t vector = 0;
mbed_official 103:9b881da47c92 250 switch ((int)obj->uart) {
mbed_official 103:9b881da47c92 251 case LPC_USART0_BASE: irq_n=UART0_IRQn; vector = (uint32_t)&uart0_irq; break;
mbed_official 103:9b881da47c92 252 case LPC_USART1_BASE: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
mbed_official 103:9b881da47c92 253 case LPC_USART2_BASE: irq_n=UART2_IRQn; vector = (uint32_t)&uart2_irq; break;
mbed_official 103:9b881da47c92 254 }
mbed_official 103:9b881da47c92 255
mbed_official 103:9b881da47c92 256 if (enable) {
mbed_official 381:5460fc57b6e4 257 NVIC_DisableIRQ(irq_n);
mbed_official 381:5460fc57b6e4 258 obj->uart->INTENSET |= (1 << ((irq == RxIrq) ? 0 : 2));
mbed_official 103:9b881da47c92 259 NVIC_SetVector(irq_n, vector);
mbed_official 103:9b881da47c92 260 NVIC_EnableIRQ(irq_n);
mbed_official 103:9b881da47c92 261 } else { // disable
mbed_official 103:9b881da47c92 262 int all_disabled = 0;
mbed_official 103:9b881da47c92 263 SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
mbed_official 504:f0fe52f5109e 264 obj->uart->INTENCLR |= (1 << ((irq == RxIrq) ? 0 : 2)); // disable the interrupt
mbed_official 103:9b881da47c92 265 all_disabled = (obj->uart->INTENSET & (1 << ((other_irq == RxIrq) ? 0 : 2))) == 0;
mbed_official 103:9b881da47c92 266 if (all_disabled)
mbed_official 103:9b881da47c92 267 NVIC_DisableIRQ(irq_n);
mbed_official 103:9b881da47c92 268 }
mbed_official 103:9b881da47c92 269 }
mbed_official 103:9b881da47c92 270
mbed_official 103:9b881da47c92 271 /******************************************************************************
mbed_official 103:9b881da47c92 272 * READ/WRITE
mbed_official 103:9b881da47c92 273 ******************************************************************************/
mbed_official 103:9b881da47c92 274 int serial_getc(serial_t *obj) {
mbed_official 103:9b881da47c92 275 while (!serial_readable(obj));
mbed_official 103:9b881da47c92 276 return obj->uart->RXDATA;
mbed_official 103:9b881da47c92 277 }
mbed_official 103:9b881da47c92 278
mbed_official 103:9b881da47c92 279 void serial_putc(serial_t *obj, int c) {
mbed_official 103:9b881da47c92 280 while (!serial_writable(obj));
mbed_official 103:9b881da47c92 281 obj->uart->TXDATA = c;
mbed_official 103:9b881da47c92 282 }
mbed_official 103:9b881da47c92 283
mbed_official 103:9b881da47c92 284 int serial_readable(serial_t *obj) {
mbed_official 103:9b881da47c92 285 return obj->uart->STAT & RXRDY;
mbed_official 103:9b881da47c92 286 }
mbed_official 103:9b881da47c92 287
mbed_official 103:9b881da47c92 288 int serial_writable(serial_t *obj) {
mbed_official 103:9b881da47c92 289 return obj->uart->STAT & TXRDY;
mbed_official 103:9b881da47c92 290 }
mbed_official 103:9b881da47c92 291
mbed_official 103:9b881da47c92 292 void serial_clear(serial_t *obj) {
mbed_official 103:9b881da47c92 293 // [TODO]
mbed_official 103:9b881da47c92 294 }
mbed_official 103:9b881da47c92 295
mbed_official 103:9b881da47c92 296 void serial_pinout_tx(PinName tx) {
mbed_official 103:9b881da47c92 297
mbed_official 103:9b881da47c92 298 }
mbed_official 103:9b881da47c92 299
mbed_official 103:9b881da47c92 300 void serial_break_set(serial_t *obj) {
mbed_official 103:9b881da47c92 301 obj->uart->CTRL |= TXBRKEN;
mbed_official 103:9b881da47c92 302 }
mbed_official 103:9b881da47c92 303
mbed_official 103:9b881da47c92 304 void serial_break_clear(serial_t *obj) {
mbed_official 103:9b881da47c92 305 obj->uart->CTRL &= ~TXBRKEN;
mbed_official 103:9b881da47c92 306 }
mbed_official 103:9b881da47c92 307
mbed_official 103:9b881da47c92 308 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow) {
mbed_official 182:242346c42295 309 if ((FlowControlNone == type || FlowControlRTS == type)) txflow = NC;
mbed_official 182:242346c42295 310 if ((FlowControlNone == type || FlowControlCTS == type)) rxflow = NC;
mbed_official 182:242346c42295 311 switch_pin(&SWM_UART_RTS[obj->index], rxflow);
mbed_official 182:242346c42295 312 switch_pin(&SWM_UART_CTS[obj->index], txflow);
mbed_official 182:242346c42295 313 if (txflow == NC) obj->uart->CFG &= ~CTSEN;
mbed_official 182:242346c42295 314 else obj->uart->CFG |= CTSEN;
mbed_official 103:9b881da47c92 315 }
mbed_official 103:9b881da47c92 316